NASA Logo

NTRS

NTRS - NASA Technical Reports Server

Collections About News Help Login
Back to Results
Additives Lower Pickup Of Moisture By PolyimidesSeries of new polyimide-processing additives decrease free volume and pickup of moisture in new 422 copolyimide. Physical properties of several copolyimides synthesized from linear BDSDA/ODA/MPD homopolymers investigated previously, by positron-annihilation spectroscopy, with results indicating copolyimides have unique transition molecular structure characterized by higher electron densities and stronger bonds. Transition structure permits both physical and chemical entry of water molecules into it.
Document ID
19890000179
Acquisition Source
Legacy CDMS
Document Type
Other - NASA Tech Brief
Authors
St. Clair, Terry L. (NASA Langley Research Center, Hampton, VA.)
Singh, Jag J. (NASA Langley Research Center, Hampton, VA.)
Pratt, J. Richard (Planning Research Corp.)
Date Acquired
August 14, 2013
Publication Date
April 1, 1989
Publication Information
Publication: NASA Tech Briefs
Volume: 13
Issue: 4
ISSN: 0145-319X
Subject Category
Materials
Report/Patent Number
Report Number: LAR-13679
ISSN: 0145-319X
LAR-13679
Accession Number
89B10179
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

Available Downloads

There are no available downloads for this record.

Related Records

IDRelationTitleN87-12614/TBSee Also
No Preview Available